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Clarkina
''Clarkina'' is an extinct genus of conodonts. It is considered to be an offshore, outer shelf or basinal, deep-water taxon. The genus name is a tribute to David Leigh Clark. Synonyms ''Clarkina'' Soodan 1975 is a junior synonym for the prehistoric sea cucumber '' Soodanella'' Huddleston 1982 in the family Priscopedatidae. ''Clarkina'' Jordan & Evermann, 1927 is a junior synonym for the cyprinid fish genus '' Mylocheilus'' Agassiz, 1855. Use in stratigraphy The top of the Capitanian (or the base of the Wuchiapingian) is defined as the place in the stratigraphic record where the conodont subspecies ''Clarkina postbitteri postbitteri'' first appears. The top of the Wuchiapingian (or the base of the Changhsingian) is defined as the place in the stratigraphic record where the conodont species ''Clarkina wangi'' first appears. The global reference section is profile D at Meishan Meishan (; Sichuanese Pinyin: Mi2san1; local pronunciation: ; ), formerly known as Meizhou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wuchiapingian
In the geologic timescale, the Wuchiapingian or Wujiapingian (from in the Liangshan area of Hanzhong, Shaanxi Province) is an age or stage of the Permian. It is also the lower or earlier of two subdivisions of the Lopingian Epoch or Series. The Wuchiapingian spans the time between and million years ago (Ma). It was preceded by the Capitanian and followed by the Changhsingian. Regional stages with which the Wuchiapingian is coeval or overlaps include the Djulfian or Dzhulfian, Longtanian, Rustlerian, Saladoan, and Castilian. Stratigraphic definitions The Wuchiapingian was first used in 1962, when the Lopingian Series of southwestern China was divided in the Changhsingian and Wuchiapingian Formations. In 1973 the Wuchiapingian was first used as a chronostratigraphic unit (i.e. a stage, as opposed to a formation, which is a lithostratigraphic unit). The base of the Wuchiapingian Stage is defined as the place in the stratigraphic record where the conodont species '' Clarkin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Global Boundary Stratotype Sections And Points
This is a list of Global Boundary Stratotype Sections and Points. Since 1977, Global Boundary Stratotype Sections and Points (abbreviated GSSPs) are internationally agreed upon reference points on stratigraphic sections of rock which define the lower boundaries of stages on the geologic time scale. They are selected by the International Commission on Stratigraphy based on multiple factors, but their accessibility and the degree to which they are representative of the same boundary on sections worldwide are among the most important. Since GSSPs require well-preserved sections of rock without interruptions in sedimentation, and since most are defined by different stages of animal life, defining them becomes progressively more difficult as one goes further back in time. Organization of this list This list is divided first into the geologic eras of the Phanerozoic (the Cenozoic, the Mesozoic, and the Paleozoic) and then into the geologic periods of each era. Each period is marke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capitanian
In the geologic timescale, the Capitanian is an age or stage of the Permian. It is also the uppermost or latest of three subdivisions of the Guadalupian Epoch or Series. The Capitanian lasted between and million years ago. It was preceded by the Wordian and followed by the Wuchiapingian.; 2004: ''A Geologic Time Scale 2004'', Cambridge University Press A significant mass extinction event occurred at the end of this stage, which was associated with anoxia and acidification in the oceans and possibly caused by the volcanic eruptions that produced the Emeishan Traps. This extinction event may be related to the much larger Permian–Triassic extinction event that followed about 10 million years later. Stratigraphy The Capitanian Stage was introduced into scientific literature by George Burr Richardson in 1904. The name comes from the Capitan Reef in the Guadalupe Mountains (Texas, United States). The Capitanian was first used as a stratigraphic subdivision of the Guadal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Changhsingian
In the geologic time scale, the Changhsingian or Changxingian is the latest age or uppermost stage of the Permian. It is also the upper or latest of two subdivisions of the Lopingian Epoch or Series. The Changhsingian lasted from to 251.902 million years ago (Ma). It was preceded by the Wuchiapingian and followed by the Induan. The greatest mass extinction in the Phanerozoic eon, the Permian–Triassic extinction event, occurred during this age. The extinction rate peaked about a million years before the end of this stage. Stratigraphic definitions The Changhsingian is named after Changxing () in northern Zhejiang, China. The stage was named for the Changhsing Limestone. The name was first used for a stage in 1970; 1973: ''Permian stages names'', in: : ''The Permian and Triassic systems and their mutual boundary'', Canadian Society of Petroleum Geologists Memoir 2, pp 522–548. and was anchored in the international timescale in 1981.; 2006: ''The Global Boundary Stratotyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadalupian
The Guadalupian is the second and middle series/ epoch of the Permian. The Guadalupian was preceded by the Cisuralian and followed by the Lopingian. It is named after the Guadalupe Mountains of New Mexico and Texas, and dates between 272.95 ± 0.5 – 259.1 ± 0.4 Mya. The series saw the rise of the therapsids, a minor extinction event called Olson's Extinction and a significant mass extinction called the end-Capitanian extinction event. The Guadalupian was previously known as the Middle Permian. Name and background The Guadalupian is the second and middle series or epoch of the Permian. Previously called Middle Permian, the name of this epoch is part of a revision of Permian stratigraphy for standard global correlation. The name "Guadalupian" was first proposed in the early 1900s, and approved by the International Subcommission on Permian Stratigraphy in 1996. References to the Middle Permian still exist. The Guadalupian was preceded by the Cisuralian and followed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neogondolella
''Neogondolellla'' is an extinct genus of conodonts. ''Neogondolela regalis'' was re-evaluated in 2018 File:2018 Events Collage.png, From top left, clockwise: The 2018 Winter Olympics opening ceremony in PyeongChang, South Korea; Protests erupt following the Assassination of Jamal Khashoggi; March for Our Lives protests take place across the United ... by Martyn Lee Golding. References Conodonts {{conodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Leigh Clark
David L. Clark is a paleontologist. He was the W.H. Twenhofel Professor of Geology and Geophysics at the University of Wisconsin–Madison, Madison, Wisconsin. In 1972, he described the conodont genus '' Neostreptognathodus''. Awards and tributes In 2001, he received the Raymond C. Moore Medal which is awarded by the Society for Sedimentary Geology to persons who have made significant contributions in the field which have promoted the science of stratigraphy by research in paleontology. The conodont genus name '' Clarkina'' and species name ''Streptognathodus clarki'' are tributes to David Leigh Clark. Works * Conodont Conodonts ( Greek ''kōnos'', " cone", + ''odont'', " tooth") are an extinct group of agnathan (jawless) vertebrates resembling eels, classified in the class Conodonta. For many years, they were known only from their tooth-like oral elements, w ...s and Zonation of the Upper Devonian in the Great Basin. David Leigh Clark and Raymond Lindsay Ethin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mylocheilus
''Mylocheilus caurinus'', the peamouth, peamouth chub, redmouth sucker or northwestern dace, is a species of freshwater ray-finned fish from the family Cyprinidae, the carps and minnows, that is found in western North America. It is the only species in its genus. Description The peamouth is a slender fish, with a somewhat compressed body and a subterminal mouth, large eyes, a rounded snout and a forked tail. It has a dark back, contrasting with silvery underparts separated by two dusky, longitudinal stripes. The mouth is reddish at the corners where there are small barbels. When breeding the mature males develop a red stripe along the sides on the belly, mouth, gill cover and pectoral fin base. The dorsal fin and the anal fin each have 8 soft rays and the lateral line has 66-84 scales. They can grow to in total length. Distribution The peamouth occurs in western North America from the Mackenzie River in the North West Territories, the Nass River and the Peace River in Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gondolellidae
Gondolellidae is an extinct family of conodonts in the order Ozarkodinida Ozarkodinida is an extinct conodont order. It is part of the clade Prioniodontida, also known as the "complex conodonts". Name Ozarkodinida is named after the Ozark Mountains of Missouri Missouri is a U.S. state, state in the Midwester .... There are three subfamilies: Mullerinae, Neogondolellinae and Novispathodinae. References External links * * Ozarkodinida families {{conodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinz Kozur
Heinz Walter Kozur (born 26 March 1942 in Hoyerswerda; died 20 December 2013 in Budapest) was a German paleontologist and stratigrapher. In 1974, with Mock, he described the conodont genus '' Misikella'', in 1975, with Merrill, the genus '' Diplognathodus'', in 1977, the genus '' Vjalovognathus'', in 1988, the genus ''Budurovignathus'', in 1989, the genus '' Mesogondolella'', in 1990, the genera '' Clarkina'' and '' Chiosella'' and in 2003, the genus ''Carnepigondolella''. In 2011, with RE Weems, he made additions to the uppermost Alaunian through Rhaetian The Rhaetian is the latest age of the Triassic Period (in geochronology) or the uppermost stage of the Triassic System (in chronostratigraphy). It was preceded by the Norian and succeeded by the Hettangian (the lowermost stage or earliest ... (Triassic) conchostracan zonation of North America.Additions to the uppermost Alaunian through Rhaetian (Triassic) conchostracan zonation of North America: New Mexico Museum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meishan
Meishan (; Sichuanese Pinyin: Mi2san1; local pronunciation: ; ), formerly known as Meizhou () or Qingzhou (), is a prefecture-level city with 2,955,219 inhabitants as of 2020 census whom 1,232,648 lived in the built-up (or metro) area made of the 2 urban districts of Dongpo and Pengshan. Its located in Sichuan province, China. Meishan is in the southwest of Sichuan Basin. It belonged to Leshan Prefecture before 1997. Then Meishan Prefecture was founded in 1997 upon approval of state council. It was renamed Meishan City in 2000. Administrative subdivisions It has 2 county-level district and 4 counties. History Notable people * Su Shi, Song Dynasty writer and poet (1037–1101), was a native of Meishan, and a historic temple commemorating him and his father and brother, also notable writers (the "three Su") is located in the city. *Yuan Chiung-chiung Yuan Chiung-chiung (; born 25 November 1950) is a Taiwanese writer whose family originated in Meishan, Sichua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
